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    <title>MongoDB Jira</title>
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    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-16342] Top stats lock is hot</title>
                <link>https://jira.mongodb.org/browse/SERVER-16342</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description></description>
                <environment></environment>
        <key id="171590">SERVER-16342</key>
            <summary>Top stats lock is hot</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="9">Done</resolution>
                                        <assignee username="daniel.gottlieb@mongodb.com">Daniel Gottlieb</assignee>
                                    <reporter username="eliot">Eliot Horowitz</reporter>
                        <labels>
                    </labels>
                <created>Thu, 27 Nov 2014 17:48:32 +0000</created>
                <updated>Wed, 5 Apr 2017 16:44:26 +0000</updated>
                            <resolved>Tue, 6 Dec 2016 16:27:28 +0000</resolved>
                                                                    <component>Concurrency</component>
                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="1450336" author="daniel.gottlieb@10gen.com" created="Tue, 6 Dec 2016 16:27:28 +0000"  >&lt;p&gt;Running the benchmarks and looking at likely workloads to replicate this observation have shown a ~2.0% improvement with a patch that does not record any `top` statistics (including not grabbing the lock at all). A patch that acquires the lock, but does not record any statistics is a ~1.7% speedup.&lt;/p&gt;

&lt;p&gt;The lock is not currently a major contributor to performance.&lt;/p&gt;</comment>
                            <comment id="1436053" author="milkie" created="Wed, 16 Nov 2016 22:11:02 +0000"  >&lt;p&gt;We should reconfirm this is still an issue.&lt;/p&gt;</comment>
                            <comment id="774172" author="xgen-internal-githook" created="Thu, 27 Nov 2014 21:35:10 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;erh&apos;, u&apos;name&apos;: u&apos;Eliot Horowitz&apos;, u&apos;email&apos;: u&apos;eliot@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16342&quot; title=&quot;Top stats lock is hot&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16342&quot;&gt;&lt;del&gt;SERVER-16342&lt;/del&gt;&lt;/a&gt;: formatting of top.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/d36eac67be457c8a4e11373b0332e2d8d54975e1&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/d36eac67be457c8a4e11373b0332e2d8d54975e1&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="774171" author="xgen-internal-githook" created="Thu, 27 Nov 2014 21:35:09 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;erh&apos;, u&apos;name&apos;: u&apos;Eliot Horowitz&apos;, u&apos;email&apos;: u&apos;eliot@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16342&quot; title=&quot;Top stats lock is hot&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16342&quot;&gt;&lt;del&gt;SERVER-16342&lt;/del&gt;&lt;/a&gt;: remove some snapshot global data that doesn&apos;t make sense any more&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/4e53ba220a73a28a9bd50347c66c347ae97e8b11&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/4e53ba220a73a28a9bd50347c66c347ae97e8b11&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="172866">SERVER-16426</issuekey>
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            <issuekey id="160177">SERVER-15395</issuekey>
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